Surface-Plasmon-Enhanced Near-Field Radiative Heat Transfer between Planar Surfaces with a Thin-Film Plasmonic Coupler

Lim, Mikyung; Song, Jaeman; Lee, Seung S.; Lee, Jungchul; Lee, Bong Jae

doi:10.1103/physrevapplied.14.014070

Cited by 25 publications

(26 citation statements)

References 54 publications

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“…2 can be associated with various applications. Large-area experiments [46][47][48][49][50][51][52][53][54][55][56][57][58] address in particular the requirements for near-field thermophotovoltaic (TPV) conversion 44,[59][60][61][62] , where infrared (IR) energy emitted by a hot body is converted into electrical energy by a dedicated IR photovoltaic cell 63 . High-temperature thermal sources are expected to be used for energy harvesting.…”

Section: Applications Enabled By the Current State-ofthe-artmentioning

confidence: 99%

Radiative heat transfer at the nanoscale: experimental trends and challenges

2021

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Section: Applications Enabled By the Current State-ofthe-artmentioning

confidence: 99%

Radiative heat transfer at the nanoscale: experimental trends and challenges

2021

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“…Since the concept of the NF-TPV system was first proposed in ref. [2], there have been only a few groups who have experimentally realized NF-TPVs [4][5][6][7][8][9][10], despite the substantial progress in measuring the near-field radiation [17,[19][20][21][25][26][27][28]. The main factors of experimental difficulty are the essential requirements for a practical high-power-output NF-TPV: a large heat transfer area and a large temperature difference between the emitter and the PV cell.…”

Section: Discussionmentioning

confidence: 99%

“…The near-field radiation between the emitter and the PV cell is calculated by adding contributions of propagating and evanescent modes, as [21,23,24]:…”

Section: Discussionmentioning

confidence: 99%

“…Because the doped-Si emitter and the thin Au layer of the PV cell are designed to serve as capacitive electrodes in parallel, we can estimate the main vacuum gap distance (i.e., described as d in Fig. 1b) between the emitter and the PV cell by measuring the capacitance [17,[19][20][21]. In addition, three doped-Si sub-capacitive electrodes (sub1, sub2, and sub3) are symmetrically fabricated around the emitter to obtain three additional vacuum gap distances between each sub-capacitive electrode and the Ag/Cr electrode of the PV cell.…”

Section: Devices and Experimental Setupmentioning

confidence: 99%

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Thermophotovoltaic energy conversion in far-to-near-field transition regime

Song,

Jang,

Lim

et al. 2021

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Recent experimental studies on near-field thermophotovoltaic (TPV) energy conversion have mainly focused on enhancing performance via photon tunneling of evanescent waves. In the submicron gap, however, there exist peculiar phenomena caused by the interference of propagating waves, which is seldom observed due to the dramatic increase of the radiation by evanescent waves in full spectrum range. Here, we experimentally demonstrate the oscillatory nature of near-field TPV energy conversion in the far-to-near-field transition regime (250-2600 nm), where evanescent and propagating modes are comparable due to the selective spectral response by the PV cell.Noticeably, it was possible to produce the same amount of photocurrent at different vacuum gaps of 870 and 322 nm, which is 10% larger than the far-field value. Considering the great challenges in maintaining nanoscale vacuum gap in practical devices, this study suggests an alternative approach to the design of a TPV system that will outperform conventional far-field counterparts.

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“…When the distance between two objects is comparable to or less than the thermal wavelength, the photon tunneling effect plays an essential role in the thermal radiative transfer, greatly enhancing the near-field radiative heat transfer (NFRHT) past the Planckian blackbody limit by several orders of magnitude [1][2][3][4][5][6]. Numerous theoretical studies on the NFRHT between various materials and nanostructures have been performed, such as transfer between two planar surfaces [1,7,8], two nanoparticles [8,9], two gratings [10][11][12][13][14], one sphere and plane [15], three bodies [16], and so on [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Recently, many experimental reports have indicated that the NFRHT can exceed the blackbody limit for a plane-plane configuration [33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Effective Approximation Method for Nanogratings-induced Near-Field Radiative Heat Transfer

et al. 2022

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Nanoscale radiative thermal transport between a pair of metamaterial gratings is studied within this work. The effective medium theory (EMT), a traditional method to calculate the near-field radiative heat transfer (NFRHT) between nanograting structures, does not account for the surface pattern effects of nanostructures. Here, we introduce the effective approximation NFRHT method that considers the effects of surface patterns on the NFRHT. Meanwhile, we calculate the heat flux between a pair of silica (SiO2) nanogratings with various separation distances, lateral displacements, and grating heights with respect to one another. Numerical calculations show that when compared with the EMT method, here the effective approximation method is more suitable for analyzing the NFRHT between a pair of relatively displaced nanogratings. Furthermore, it is demonstrated that compared with the result based on the EMT method, it is possible to realize an inverse heat flux trend with respect to the nanograting height between nanogratings without modifying the vacuum gap calculated by this effective approximation NFRHT method, which verifies that the NFRHT between the side faces of gratings greatly affects the NFRHT between a pair of nanogratings. By taking advantage of this effective approximation NFRHT method, the NFRHT in complex micro/nano-electromechanical devices can be accurately predicted and analyzed.

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Surface-Plasmon-Enhanced Near-Field Radiative Heat Transfer between Planar Surfaces with a Thin-Film Plasmonic Coupler

Cited by 25 publications

References 54 publications

Radiative heat transfer at the nanoscale: experimental trends and challenges

Radiative heat transfer at the nanoscale: experimental trends and challenges

Thermophotovoltaic energy conversion in far-to-near-field transition regime

Effective Approximation Method for Nanogratings-induced Near-Field Radiative Heat Transfer

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